Shaft

JL82

Hello,

I'm new user of the FEA and Mecway. I have experience of the FEA about ten years ago but now I will be starting again to use it. Do you have for example the shaft with torque moment here in forum or Youtube?? I can calculate strenght of a shaft by hand...

I downloaded the trial of Mecway yesterday. How do I add the toque moment to the shaft?

Victor

Hello JL82

There's no direct way. A distributed moment isn't a uniquely defined problem so you will have to make some judgement about what's the best way to distribute the forces.

Here's an example done by laying beam elements (Mesh tools -> Create -> Element) over the end of a solid shaft. You can apply a moment to one of the beam nodes. Disadvantages are that the beams introduce artificial stiffness and don't distribute it very smoothly without a lot of tedious beam placing.

You could also just use two opposing forces. The stress near the forces will be wrong but you can ignore that.

Here's another thread about the topic
http://mecway.com/forum/discussion/comment/281/#Comment_281

Another way is to use bonded contact to join the end of the shaft to a single big element which has the loads applied to it. This would give a more uniform force distribution without manually creating lots of elements. An example is shown in this thread:
http://mecway.com/forum/discussion/91/reaction-summation-on-fixed-support#latest

Sergio

Hi, what about setting up a rigid body between the outside nodes of the shaft and two dummies nodes as pilots in the rotation center, then apply a rotation (angle, not moment) on the pilot nodes. Solve with CCX and Then you could do a plot of the reaction moment and look for the specific angle that causes your desired moment.

Regards

JL82

Thanks Victor!